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Updated: Aug 26, 2026

Studying Large Amplitude Oscillatory Shear Response of Soft Materials
Published on: April 25, 2019
Spatiotemporal oscillations and rheochaos in a simple model of shear banding
1Polymer IRC and School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom. s.m.fielding@leeds.ac.uk
Abstract:
We study a simple model of shear banding in which the flow-induced phase is destabilized by coupling between flow and microstructure (wormlike micellar length). By varying the strength of instability and the applied shear rate, we find a rich variety of oscillatory and chaotic shear banded flows. At low shear and weak instability, the induced phase pulsates next to one wall of the flow cell. For stronger instability, high shear pulses ricochet across the cell. At high shear we see oscillating bands on either side of central defects. We discuss our results in the context of recent experiments.
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